How will you describe the work done and the time it takes Jack and ben lift the sack of rice?
Solution:
Given:
Force = 150 N or 150 kg.m/s2
Displacement = 1.5 meter
Time = 5 seconds (Jack)
=15 seconds (Ben)
Computation:
Work (W) =force (f) x displacement (d)
W = fd
W= (150 kg.m/s2) 1.5 m
W= 225 kg.m2/s2
Force = 150 N or 150 kg.m/s2
Displacement = 1.5 meter
Time = 5 seconds (Jack)
=15 seconds (Ben)
Computation:
Work (W) =force (f) x displacement (d)
W = fd
W= (150 kg.m/s2) 1.5 m
W= 225 kg.m2/s2
Answer: The work done for both of them is equal but in terms of their power it differs to each other.
The greater the power, the lesser the time needed.
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